This French thriller begins with a flashback to a small village dance where a six-year-old girl is kidnapped and killed. Seventeen years later the murder remains unsolved. The girl's parents Caroline and Chris have gone on with separate lives Caroline remarried and had another daughter while Chris became an alcoholic. The two are thrown back together when each begin receiving strange messages that imply their daughter has returned from the dead for vengeance. They contact a police detective (the lover of Caroline's best friend) who finds the case intriguing and decides to reopen it. Unfortunately, as soon as he begins questioning the old suspects, people begin to die.

Valentine, a student model in Geneva, struggles with a possessive boyfriend and a troubled family. When she runs over a dog, she discovers that its owner, a retired judge, is illegally wiretapping and eavesdropping on his neighbors' phone calls. Although Valentine is outraged, she develops a strange bond with the judge – and as the two become closer, she finds herself caught in the middle of events that could change her life.